Automatic motor-stopping device.



BLOGKBURGR.

AUTDMATIG MOTR STOPPIN G DEVCE.

PPLIUA'TION FILED'SEPT. 12, 1912.-v

' Patented Nav. 25, E913.

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J. L. BLOGKBUHGBR.'

AUTOMATIC MOTOR STOPPING DEVICE.

APPLICATION FILED sBPT-12, 1912. v Patented Nov. 25, g.

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g Mwgw a ai gw JOHN Ii. BLOCKBRGER, OF CHICAGO,- ILLINOIS.

AUTOMATIC 'MIOTOB-STOPPING DEVICE.

-Specification of Letters Patent.

Application :tiled September 12, 1912. Serial No. 719,932.

" T all wiz-0m t may concern:

1 and-pawl counting devices,` which, besides 'Be it known that I, JoHN L. BLocKnUncnn, a' citizen of the United States, residing at Chicago, in theA county of Cook and State of Illinois, have invented certain new and useful Improvements in Automatic Motor- Stopping Devices, of which the following is a specification.

Y My invention relates to improvements in automatic motor-stopping devices and more particularly to a device for automatically stopping the motion of talking machines, upon completion of a record.

One of the objects of my invention is to provide an eificient means, operable with a minimum of effort on the part of the user, adapted for adjustment to control the nioinent of operation of the device to correspond exactly with the enel of the particular record.

To this end, a more particular object of my invention is to provide, in conjunction with the above mentioned adjustment means',

means whereby the adjustment may be made evenbefore the particular record is placed upon thn record-receiving table of the talking machine, such means taking the form of an indicator having indicia corresiionding to indicia which may have been placed previ- -oiisly upon the particular record. 4 Further my invention contemplates an ari rangement of particular parts peculiarly adaptable for use to accomplish the above results, wit-hout change in the talking nia-l chines to which it is applied, my device being cheap and simple of construction, easy to apply, and not accompanied with such disadvantages as adding unnecessary weight l to the needle carrying frame of the talking machine, providing parts bearing upon the record, or extending over the record, or in'v tended to interfere with the needle, either vduring operation or at the close thereof, and not imposing upon the .usual motor of tliel talking machine any burden such as ratchetinvolving considerations of the number of threads on the record, require power during the playing of the record.

Other and further objects of my invention will become apparent from a consideration of the following description when taken in conjunction with the drawings, wherein- Figure l is'a plan view of a talking inachine of the disk type 'with an automatic stopping device applied thereto in accord-v` ance with my invention; showing the electromagnet energized and the brake of the` tion appiied to a conventional talking machine/,of the type where the records are disk shape, and it. will of course be understood that the invention is also applicable to other types of talking machines.

In the construction shown, 5 indicates the casing of the. talking machine, 6 the rotatingL table to receive the record (shown at in Fig. l), 7 indicates the reproducer or soundbox of ordinary construction carrying the needle 8 and cirried by the hollow arm 9 which is pivotally mounted, as at l0, for sound-traneniitting communication with the horn or other enlarged outlet from which the sound issues, the pivotal. mounting of the arm S) permitting free swinging moveinent thereof as when the needle 8 follows the threaded track on the rotating record.

My invention may be conveniently embodied by the use of batteries and an electromagnet with a suitable circuit for the electroinagnet, to be automatically made as soon as the needle S reaches the end of the track on the record (3. This making of the circuit may be readily attained hy mounting upon the casing of the talkingl machine a contact for coaction with the arn'i 9 to complete the circuit for the electromaglict.

Specifically, l2 indicates the batteries, herein shown as dry batt-cries; l?) indicates the electromagnet arranged within the casing suitably positioned with respect to a brake device, to bc described, and 14 indicates the contact. for cooperation with the arci 9, said contact herein taking the forni of a post having its pointed free end bent over, as alY l5. toward the arm E), said post llil` eing preferably mounted for rotation with sonic friciional resistance so that the position of the bent. over portion 15 with respect to the arm S) inay be adjusted to vary the moment of contact. Thus, a rceord being placed upon the table 6 and arm S) placed so that the needle 8 stands at the end of the record-thread, posi 14 may Patented Nov. 25,1913.

be swung to contacting position where it will remain to receive contact from arm 9 at the proper moment after operation of the talking machine. For further advantagein setting the vdevice for the particular record, I provide an indicating means herein shown, for convenience and simplicity, as the ,s'eg mental gear member 14a secured on post 14 and meshing with pinion 14h. The pinion 14h carries pointer 14c for coaetiorr with a scale 14d. Therefore, when the post is set as above described by means of thearm 9, note of the scale reading may be made on the particular record so that all subsequent settings for that record involve only the movement of post 14 to bring pointer 14c to the scale line noted on the record.

The brake device, usually provided upon talking machines of this type, includes a spring-pressed plunger 17 the spring 18 whereof engages between a shoulder 19 and the end of a plunger casing 20. The plunger 17 is provided with a pin 21 extending downwardly therefrom through a slot 22 in the easing 2G. The casing 2O is provided with laterally extending lugs 23 for attachment as by screws 24 to the casing, and pivoted as at 25 is an operating lever 26 having a cam-portion 27 tor coaction with the pin 21 of the brake plunger. Thus, said plunger may be moved out of engagement with the table 64 or the compression spring 18 maybe permitted to push the plunger into frictional engagement therewith, accordingly as the lever 26 is in the position shown in F ig.v

4 or F ig. 1 respectively. It will be noted that as soon as lever 26is moved part way from its record-releasing position, shown in Fig. 4, the coaction of pin 21 upon the cam surface 27 causes the lever 26 to move to its final position shown in Fig. 1 without further manual operation, since the spring 18 pushes the pin 21 against the cam 27. Therefore, lever 26 will always automatically move to its final position shown in Fig. 1, even if not moved quite so far by manual means or the automatic means hereafter described.

Utilizing this construction to accomplish the desired ends, I may employ the lever 26 one of the contacts of an electric circuit including the electromagnet 13the coacting contact being a member controlled by the electromagnet for moving the lever 26 from its releasing position (Fig. 4) to stopping Aposition (Fig. 1). Specifically, the casing may be bored, as at 28, and preferably also provided with a plate 29 surrounding t-he bore and secured to the easing additionally to the screws 24, by screws 30.

The operating means for the lever 26 controlled by the electromagnet 13 is herein shown as a bell-crank lever 31, one arm 32 of which constitutes the armature for the electromaguet 13 and the other arm 33 ot which extends upwardly as 34 for coaction with the lever 26. -It will be noted that lever 26 and the vertical portion 34 of arm 33 are in contact when the parts are in the position shown in Fig. 4,--the brake being ofi-.and that `in such position the armature 32 of the electromagnet is retracted.

The electrical circuits for the devices above described may be as follows: From the battery 12, wire 35 extends into connection, as by binding post 36', with the pivoted metallic arfm 9 of the talking machine mechanism, and wire 37 extends from the post 14 (binding post 38) into connection, as at 39, with the brake mechanism above described, the lever 26 constituting a 'contact for coaction with the vertical portion 34 of the armaturecontrolled lever 33, which is connected as by wire 40 to the electromag'nct 13 and thence by wire 41 to the other terminal of the battery 12. It will thus be seen that there is pro` vided for the battery a circuit which is closed only when the pivoted arm 9 and thepost 14 are in contact and at the same time lever 26 and the armature-controlled portion 34 are in contact.

Before starting, the post 14 is adjusted as above described. Then, during operation, the arm 9 gradually moves nearer and nearer to the adjusted post 14 until contact between the arm 9 and the post 14 is finally made at the moment the record is finished. Therefore, parts 34 and 26 being in contact, the circuit is completed as follows: 12, 35, 36, 9, 15, 14, 38, 37, 39, through the plate 29 to the lever 26, 34, 33, 31, 40, 13, 41, 12, so energizing the electromagnet 13 which retracts its armature 32 so moving lever 26 from the position shown in Fig. 4 to the po` sition shown in Fig. 1. This movement of the lever 26 operates as above described to 105 stop rotation of the table 6 by permitting spring-impelled movement of the plunger 17 thereagainst. I

It will be remembered that the lever 26 having been positively moved a part of the 110 way toward locking position, automatically completes its movement to position shown in fFig. 1 independently ofthe initiating means (armature-controlled part 34). I therefore preferably arrange the parts in such manner that the armature 32 when fully attracted as in Fig. 1 .will not have brought the member 34 far enough in the direction of lever 26 to be in contact therewith, so that the circuit is automatically broken the moment the lever 26, under influence-of spring 18 moves farther than the armature 32 will permit the portion 34 to move, the circuit being therefore broken the moment the record-receiving table Ghas been stopped. It will thus be apparent that when the device is started in operation, the user may leave the instrument without need of returning until a new record is to be played, when the operation as above described is simply repeated, lever 26 130 amasar of course being manually returned from locking position shown in Fig. l to thev releasing position shown in Fig. 4 to permit rotation of the table 6.

WhileI havelierein described an embodiment of my invention itwill be apparent that many changes may be made in the parts employed in the carrying out of my teachings and in adapting the'device to existing types of talking machines, and it will be apparent tothose skilled in the art that my invention is therefore not limited to the sinle embodiment shown for purposes of full isclosure further 'than is specically indi` cated by the appendedl claims.

l. Abrake mechanism of the character described comprising in combination a travcling element, a brake plunger,v an electric circuit, means included in the circuit for controlling the-brake plunger, one terminal of the circuit being' adapted for electric'connection- With the traveling element, a contact' for the other terminal of thel circuit, said contact comprising a rotatably adjustable 6st having a crank arm adapted to\be set 1n the path of sai traveling blementga scale,

a pointer in co erative relation with the the scale by rotation ofthe post'.

2. The combination of a casinghaving a top, a 'rotatable element mounted on the upper side of the top, a swin g arm pivotscale, and means for moving the' pointer, pver ally supportedY above the top o thecasing and Working across therotatable element, 'a i brakefplunger mounted on the casintop in coperative relation with the rotata leelement, an electric circuit disposed beneath the casing top with one terminal connectedA with 4tbe swinging armmeans included inthe ein cuit and located below the casing top for controlling the brake plunger,` a contact com mesh with the pinion land carried concen- .trically by the post.

3. The combination of ar rotatable member,-4

an arm mounted to "travel with respect to the vrotatable member, a brake plunger mounted to Contact said member, 'electrically operated releasing means for said plunger including an adjustable contact adapted to be ositioned in the path of movement of sai arm, a scale graduated with respect to predetermined operative positions of said proximity tosaid scale, and an operative connection between the pointer and the contact whereby: a desired position of the conarm, a pointer mounted for movement in tact in tlie path of movement of said arm is secured lupon adljustment 'of the pointer `to a predetermined position 'indicated by said scale.

In testimony whereof I hereunto set my hand in the presence of two Witnesses.

l JOHN L. nrocnfnnncnn In the lpresence of- 'W'. LINN ALLEN,A

- MARY F. ALLEN. 

